Oh.....I remember! the redo Plane only appears right after you add an object, but as soon as you click on the screen , the redo panel disappears. However... pressing Shift Ctrl Z at same time brings up four ways to view object: wire, solid, material, rendered. But does not activate hot key F9 to change size! has this changed within 4.0?
There's an updated Blender Basics course for Blender 4.0, link below:
https://cgcookie.com/courses/blender-basics-an-introduction-to-blender-4-x